Interstate 5 northbound, two right lanes will close from 10 p.m. Friday until 5 a.m. Monday, at the West Seattle Bridge exit.

I-5 northbound, two lanes at the Ship Canal Bridge closed from 3:30 to 11 a.m. both Saturday and Sunday; on Saturday one lane will stay closed until dusk, and on Sunday one lane stays closed until 4 p.m.

Highway 520, closed between the Montlake Boulevard exit and I-405 all weekend, from 11 p.m. Friday until 5 a.m. Monday.

King County Metro Transit says buses will be re-routed. Sound Transit 545 and Metro routes 255, 271 and 280 will use I-90 during the closure of the Highway 520 floating bridge. With the viaduct closed, the RapidRide C Line to West Seattle and Route 120 to Delridge-White Center must run through Sodo outbound.

And there will be a few lesser disruptions, including these:

I-5 northbound, a single lane closes near the Interurban Avenue South exit in Tukwila, from 6 a.m. until 2 p.m. Saturday.

About The Today File

The Today File is a general news blog featuring real-time coverage of Seattle and the Northwest. It is reported by the news staff of The Seattle Times and includes stories from The Associated Press and McClatchy-Tribune Information Services.